<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <STYLE>
    .big{font-size: 25px}
    .a{font-size: 25px}
  </STYLE>
</head>
<body>
<p class="big">This is a paragraph</p>
<p class="samll"><span class="a">T</span>HIS IS A PARAGRAPH</p>
</body>
</html>